`A = 5/11 . \frac{-3}{13} . 22/5`
`= ( 5/11 . 22/5) . \frac{-3}{13}`
`= 2 . \frac{-3}{13}`
`= -6/13`
`B= 13/71 . \frac{-5}{9} - 13/71 . 4/9`
`= 13/71 . (\frac{-5}{9} - 4/9)`
`= 13/71 . (-1)`
`= -13/71`
`C= \frac{-4}{5} . 8/11 + \frac{-4}{5} . 3/11 + 5 1/2`
`=\frac{-4}{5} . ( 8/11 + 3/11) + 11/2`
`= \frac{-4}{5} . 1 + 11/2`
`= \frac{-4}{5} + 11/2`
`= 47/10`
`D= 1/2 + 3/8 + 6/-12 + 9/7 - 6/16`
`= 1/2 + 3/8 + 1/-2 + 9/7 -3/8`
`= (1/2 + 1/-2) + ( 3/8 - 3/8) + 9/7`
`= 0 + 0 + 9/7`
`= 9/7`
`E = ( 25/312 + 19/33 - 27/89) .( 1/3 + 1/6 + 1/-2)`
`=( 25/312 + 19/33 - 27/89) . ( 2/6 + 1/6 + 3/-6)`
`=( 25/312 + 19/33 - 27/89) . 0`
`= 0`
